<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="showAddCateDialog"
            >添加分类</el-button
          >
        </el-col>
      </el-row>
      <!-- 表格区域 -->
      <tree-table
        class="treeTab"
        :show-row-hover="false"
        :data="cateList"
        border
        index-text="#"
        :show-index="true"
        :columns="columns"
        :selection-type="false"
        :expand-type="false"
      >
        <!-- 是否有效 -->
        <template slot="isok" slot-scope="scope">
          <i
            class="el-icon-success"
            style="color: lightgreen"
            v-if="scope.row.cat_deleted === false"
          ></i>
          <i class="el-icon-error" style="color: red" v-else></i>
        </template>
        <!-- 排序 -->
        <template slot="order" slot-scope="scope">
          <el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
          <el-tag
            size="mini"
            v-else-if="scope.row.cat_level === 1"
            type="success"
            >二级</el-tag
          >
          <el-tag size="mini" v-else type="warning">三级</el-tag>
        </template>
        <!-- 操作 -->
        <template slot="opt">
          <el-button size="mini" type="primary" icon="el-icon-edit"
            >编辑</el-button
          >
          <el-button size="mini" type="danger" icon="el-icon-delete"
            >删除</el-button
          >
        </template>
      </tree-table>

      <!-- 分页区域 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page.sync="queryInfo.pagenum"
        :page-sizes="[1, 2, 5, 10]"
        :page-size="queryInfo.pagesize"
        layout="total,sizes, prev, pager, next"
        :total="total"
      >
      </el-pagination>
    </el-card>

    <!-- 添加分类对话框 -->
    <el-dialog
      title="添加分类"
      :visible.sync="addCateDialogVisible"
      width="50%" @close="addCateDialogClose"
    >
      <el-form
        :model="addCateFrom"
        :rules="addCateFromRules"
        ref="addCateFromRef"
        label-width="100px"
      >
        <el-form-item label="分类名称:" prop="cat_name">
          <el-input v-model="addCateFrom.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级分类:">
        <!-- options 用来指定数据源 -->
        <!-- props 用来指定配置对象 -->
        <el-cascader
          v-model="selectedKeys"
          :options="parentCateList"
          :props="cascaderProps"
          @change="parentCateChange"
          clearable
        ></el-cascader> </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCate"
          >确 定</el-button
        >
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 查询条件
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5
      },
      cateList: [],
      total: 0,
      columns: [
        {
          label: '分配名称',
          prop: 'cat_name'
        },
        {
          label: '是否有效',
          type: 'template',
          template: 'isok'
        },
        {
          label: '排序',
          type: 'template',
          template: 'order'
        },
        {
          label: '操作',
          type: 'template',
          template: 'opt'
        }
      ],
      addCateDialogVisible: false,
      addCateFrom: {
        cata_name: '',
        cat_pid: 0,
        cat_level: 0
      },
      addCateFromRules: {
        cat_name: [
          { required: true, message: '请输入分类名称', trigger: 'blur' }
        ]
      },
      parentCateList: [],
      // 指定级联选择器
      cascaderProps: {
        expandTrigger: 'hover',
        value: 'cat_id',
        label: 'cat_name',
        children: 'children',
        checkStrictly: true
      },
      selectedKeys: []
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    async getCateList () {
      const { data: res } = await this.$http.get('categories', {
        params: this.queryInfo
      })
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类失败')
      }
      this.cateList = res.data.result
      this.total = res.data.total
    },
    handleSizeChange (newSize) {
      this.queryInfo.pagesize = newSize
      this.getCateList()
    },
    handleCurrentChange (newPage) {
      this.queryInfo.pagenum = newPage
      this.getCateList()
    },
    showAddCateDialog () {
      this.getParentCateList()
      this.addCateDialogVisible = true
    },
    async getParentCateList () {
      const { data: res } = await this.$http.get('categories', { params: { type: 2 } })
      if (res.meta.status !== 200) { return this.$message.error('获取父级分类失败') }
      console.log(res.data)
      this.parentCateList = res.data
    },
    parentCateChange () {
      console.log(this.selectedKeys)
      //   this.selectedKeys =
      if (this.selectedKeys.length > 0) {
        // 父级分类id
        this.addCateFrom.cat_pid = this.selectedKeys[this.selectedKeys.length - 1]
        // 当前分类等级赋值
        this.addCateFrom.cat_level = this.selectedKeys.length
        // eslint-disable-next-line no-useless-return
        return
      } else {
        this.addCateFrom.cat_pid = 0
        // 当前分类等级赋值
        this.addCateFrom.cat_level = 0
      }
    },
    addCate () {
      // console.log(this.addCateFrom)
      this.$refs.addCateFromRef.validate(async valid => {
        if (!valid) { return }
        const { data: res } = await this.$http.post('categories', this.addCateFrom)
        if (res.meta.status !== 201) {
          return this.$message.error('添加用户失败')
        }
        this.$message.success('添加成功')
        this.getCateList()
        this.addCateDialogVisible = false
      })
    },
    // 监听对话框的监听事件，重置表单数据
    addCateDialogClose () {
      this.$refs.addCateFromRef.resetFields()
      this.selectedKeys = []
      this.addCateFrom.cat_level = 0
      this.addCateFrom.cat_pid = 0
    }
  }
}
</script>

<style lang="less" scoped>
.treeTab {
  margin-top: 15px;
}
.el-cascader {
    width: 100%;
}
</style>
